FORT MEADE, Md. — A military judge Monday allowed prosecutors to argue that an Army private used a most-wanted list compiled by the antisecrecy group WikiLeaks as a guide for leaking classified information.

The ‘‘Most Wanted Leaks of 2009’’ was admitted as evidence in the court-martial of Private First Class Bradley Manning at Fort Meade, near Baltimore.

The judge ruled the list is relevant to the government’s most serious charge that Manning aided the enemy by causing intelligence to be published on the WikiLeaks website. Prosecutors are trying to prove the information Manning leaked helped Al Qaeda.

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The most wanted list included a request for documents about detainees at Guantanamo Bay, Cuba. Manning has acknowledged sending WikiLeaks a file containing Guantanamo detainee records in March 2010.

He has said he leaked the documents of his own accord and didn’t consider them a national security risk.

The evidence came as prosecutors neared the end of their case in Manning’s court-martial on charges he aided the enemy by sending hundreds of thousands of documents to WikiLeaks while working as an intelligence analyst in Iraq in 2009 and 2010. By Monday, prosecutors had presented 28 witnesses in the trial.

Other evidence presented by the prosecution Monday suggested that Al Qaeda leaders reveled in WikiLeaks’ publication of reams of classified US documents, urging its members to study them before devising ways to attack the United States. ‘‘By the grace of God the enemy’s interests are today spread all over the place,’’ a spokesman for the terrorist group said in a 2011 Al Qaeda propaganda video.

Prosecutors also submitted excerpts from the winter 2010 issue of Al Qaeda’s online magazine ‘‘Inspire,’’ telling readers that ‘‘anything useful from WikiLeaks is useful for archiving.’’